Subchalcogenides are rare compounds that have both metal-metal and metal-chalcogenide (sulfur, selenium, tellurium) interactions. Unlike conventional semiconductors, the metals do not obey the so-called 8-N octet rule for oxidation states, often resulting in low or zero valent metal atoms. The presence of both metal-metal and metal-chalcogenide bonding can also lead...
Deformation in materials with a hierarchical microstructure is expected to be complex because of the interaction between the units that form such a microstructure. The complexity of deformation would be even higher when additional inelastic deformation modes are active in such materials, apart from traditional elastic and plastic deformation modes....
Metaphor is an important and pervasive phenomenon in language and cognition. The vast majority of psycholinguistic research on metaphor has focused on noun metaphors (e.g., That surgeon is a butcher; That lawyer is a shark), while relatively little has investigated the processing of verb metaphors (e.g., The car limped down...
The recently increasing precision in experimental measurements of observables in collider physics has demanded for a matching precision in the theoretical expectations for such observables. In Quantum ChromoDynamics, the fundamental underlying theory for collider physics, theoretical predictions are expressed under the form of perturbative series, where the expansion parameter is...
Since Infrared radiation was discovered in 1800s, the research and applications on the infrared regime have been continually developed. The infrared detectors are the key technology in these applications and have been successfully used for medical imaging, light detection and ranging (LiDAR), free-space optical communication, target tracking and object identification...
Fluid injection is one of the major triggering factors of infrastructure collapse and geo-hazards, among which some of the most recurrent ones are rainfall-induced landslides. Such events exhibit complicated spatiotemporal patterns, spanning from slow deformation to extremely rapid movements influencing large regions. To prevent the occurrence of catastrophic failures and...
Future large-scale quantum networks will likely require more efficient on-chip devices for quantum key distribution (QKD) systems that can exploit CMOS manufacturing techniques. QKD systems on chip have been produced in a number of material platforms including silicon, indium phosphide, and a range of hybrid structures. Advanced industrial silicon-electronics manufacturing...
Super-resolution (SR) has become one of the most critical problems in image and video processing. In Chapter 2 of this thesis, a detailed review of existing Deep Learning (DL) techniques for addressing the SR task, with an emphasis on how DL and analytical techniques can be combined, is provided. Chapter...
Recent developments in deep learning have led to breakthroughs in rendering novel views from sparse input views of a scene.While the accuracy of these algorithms has improved dramatically, it has come at a huge computational cost.
While developments in graphics hardware have ameliorated some of the computational burdens, deep learning-based...
In the adult hippocampus of many mammalian species, populations of newborn dentate granule cells (DGCs) are continuously generated and undergo subsequent activity-dependent neuronal maturation and incorporation into the preexisting hippocampal circuitry. Increasing evidence has demonstrated that these young adult-born DGCs (abDGCs) participate in numerous cognitive and affective processes such as...
In my dissertation, I investigate how formal and informal structures within the board can affect key board outcomes. While each chapter introduces a relatively under-recognized player in the governance space—compensation consultants (Chapter 1), multi-committee directors (Chapter 2), and executive chairmen (Chapter 3)—the main theme connecting all three centers on the...
This dissertation presents a comprehensive study of thin-film LiMn2O4 (LMO) cathodes applied in lithium ion batteries (LIBs). The primary aim was to establish fundamental understanding of the relationship between interfacial LMO chemistry/electrochemistry and its detrimental drawback, i.e. fast capacity fade over long term cycling, and then develop effective mitigation methods....
The goal of this thesis is to design practical algorithms for nonlinear optimization in the case where the objective function is deterministic or stochastic. Problems of this nature arise in many applications including machine learning and image processing. The thesis is divided into four main chapters. Chapters \ref{chap:Inexact}, \ref{chap:Adasample} and...
For much of the twentieth-century, English-language music scholars were reticent to speculate about the origins of music. In recent years, however, the study of music’s evolutionary origins has been revitalized. Resonating Subjects brings a critical-historical perspective to this renewed convergence of music studies and evolutionary science. Through close examinations of...
My research at northwestern with Dr. Christina Zelano focused on the human amygdala subnucleithat receive monosynaptic input from the olfactory bulb. Surprisingly little is known
about these brain regions, including their potential roles in olfactory and nonolfactory
processing. During my PhD, I completed three projects aimed at furthering our understanding...
While the entire silicon industry has been blooming under Moore’s Law for decades, conventional digital implementation is approaching the “stall” of Moore’s Law due to many physical design limitations. Technology innovation now is going to take a different direction. Given the increasing demand for emerging applications' computational capacity, it is...
Extensive study of nanomaterial chemical and optical properties has enabled their integration into a variety of applications. However, less thoroughly investigated are the heat generation and dissipation processes of nanomaterials following optical excitation. These phenomena are of immense importance as thermal energy can distort a material’s structure, which has profound...
My dissertation, Geographies of Memory, Trauma, and Pleasure in African American and Caribbean-American Literature examines the geographies of the cane fields, bodies of water, and the back porch to illustrate the speculative ways anti-black violence, intergenerational trauma, pleasure and Black memory co-exist in Black literature. Examining the aforementioned geographies as...
This dissertation consists of three studies related to parental employment, maternity leave policy, and early care and education. In study 1, my coauthor and I evaluate the impact of parenthood on men and women’s job performance and career advancement using detailed data from the U.S. Marines. For parents who remain...
Prostate cancer (PCa) is the most common non-cutaneous cancer among U.S. men. Lack of effective treatments for advanced disease make it a significant public health concern. However, PCa’s long natural history makes it an excellent target for prevention approaches that reduce overtreatment of indolent disease, treatment related morbidity, and mortality....
Understanding organization of soft materials on mesoscopic and nanoscopic scales is importantfor materials design. In this regard, non-van der Waals interactions such as hydrogen
bonding and electrostatic interactions offer great opportunities due to the richness and diversity
in morphological structures they produce. The primary reason for this is that these...
This dissertation studies the integration of analytical modeling and optimization, machine learning, and Bayesian learning to optimize cost, access, and quality of healthcare delivery. Chapter 1 models computer-aided triage (patient prioritization) as feature-based priority queuing where types (diseases) are not perfectly observed but are inferred from observed features using a...
This dissertation develops a causal theory of the relevant alternatives in a situation and applies this theory to the semantics and epistemology of conditionals, the theory of knowledge, and the epistemology of stereotyping. The first chapter presents the theory of causal models and causal alternatives. The second chapter applies this...
Biogenic secondary organic aerosol (SOA) particles, produced by forest ecosystems across the globe, are principal, yet poorly understood constituents in the climate system. These atmospheric particles form when biogenic volatile organic compounds (BVOCs) react with atmospheric oxidants, leading to increasingly lower volatility oxidation products that partition into the condensed phase...
Protein-based biomaterials are widely used in biomedical applications and mechanical support because of their novel structural flexibility, biocompatibility and mechanical properties. Protein-based biomaterials outperform traditional synthetic materials in various environments as traditional materials lack the diverse chemical functionalities that proteins offer. Novel bioinspired techniques such as directed evolution offer the...
Coherent diffractive imaging (CDI) methods are techniques that image a sample by illuminating it with a coherent beam and recording the intensity diffraction pattern produced by the wavefront outgoing from the sample. These are lensless methods that are not limited in resolution by the physical characteristics of an objective lens,...
Social engagement, or shared attention between a child and caregiver, is a critical process for language and social development. Although previous EEG studies have investigated child social processing in closely controlled, experimental studies, no study has examined the interactive, reciprocal process of naturalistic social engagement. In my first paper, we...
The explosion of data in the digital age has provided new possibilities for policy creation,the development of knowledge, and societal innovations. In this way, data becomes an essential
tool in personal decision-making, legal change, and policy creation as we leverage new forms of
data to understand social phenomena. But along...
Hollow biopsy needles are widely adopted medical devices for the removal of biological tissue to better identify a lesion or an abnormality observed through a physical exam or a radiology scan. These procedures can provide significantly more information than most medical tests, and they are usually performed on dermis layers,...
This dissertation considers a periodically-forced 1-D Langevin equation that possesses two stable periodic solutions in the absence of noise. We aim at answering the question: is there a most likely noise-induced transition path between these periodic solutions that allows one to identify a preferred phase of the forcing when the...
While there is high demand for university computer science (CS) courses, students often struggle when learning to program. Prior work has identified that student perceptions of their programming ability may contribute to these challenges. For example, studies show that students often perceive that they do not belong, are not capable...
Histories of digital media, software, and computing are inseparable from histories of queer and transgender life. Stored in Memory: Recovering Queer and Transgender Life in Software History situates visual media like video glitch art, the computer’s graphical user interface, video games, and computer operating systems as the product of historical...
Parkinson’s disease (PD) is the second most common neurodegenerative disorder, causing devastating disabilities in both motor and non-motor domains following the degeneration of dopamine (DA) producing neurons of the substantia nigra pars compacta (SNc). Current treatments are highly limited in efficacy, and no established treatments currently exist to alter disease...
Fausto Romitelli (1963-2004), one of the most inventive composers of his generation, created a musical language that draws inspiration from a multifaceted array of sources, including the technological landscape of daily life, the visual arts, poetry, literature, and philosophy. Furthermore, from early in his career, Romitelli incorporated elements in his...
Missing data are often described as an annoyance in research and generally presented as a source of error or bias during analysis. To this end, methods that center on planned missingness are an underappreciated and powerful tool that can actually be used to improve data collection and the validity of...
Metal-organic frameworks (MOFs) are porous, crystalline materials synthesized by combining metal nodes and organic linkers through self-assembly. The diverse range of building blocks available allows for extensive tunability of MOFs, enabling the optimization of these materials for various applications, such as gas storage, separations, and catalysis. This study aimed to...
Global energy demand is increasingly rapidly in today’s modern world with increasing living standards all around the world. As global energy demand rises, energy efficiency has never been more crucial and that the improvement of tribological systems is critical to the progress of the global future. A large part of...
Modeling human language is at the very frontier of machine learning and artificial intelligence. Statistical language models are probabilistic models that assign probabilities to sequences of words. For example, topic models are frequently used text-mining tools to organize a vast set of unstructured documents by exploring their theme structure. More...
This thesis describes a novel demonstration of quantum teleportation, a protocol within the broader field of quantum information science, carried out by an electron transfer reaction within a molecular system. As described in Chapter 1, quantum information science has potential impacts in computation, communication, and cryptography. This field relies on...
Background. Rates of common bacterial sexually transmitted infections (STIs) are at an all-timereported high in the United States, while rates of new human immunodeficiency virus (HIV)
infections are declining. Among HIV-negative men and transgender women who have sex with
men, whom are theoretically at risk for both HIV and bacterial...
For stochastic simulation optimization in a modern computing era, we introduce a new parallel framework for solving very large-scale problems using a ranking & selection (R&S) approach that simulates all systems or feasible solutions to provide a global statistical guarantee. We propose a parallel adaptive survivor selection (PASS) framework that...
This multi-study dissertation explored technology and creativity within three different technology-rich creative musical spaces. Through the use of three contrasting empirical methods (qualitative content analysis, intrinsic case study, and phenomenology), I explored the complex ways technology and musical creativity are linked. In the first study, I completed a content analysis...
Design problems are highly ill-structured, having “ambiguous specifications of goals, no determined solution path, and the need to integrate multiple knowledge domains” (Jonassen, 2000, p. 80). Design problems are generated by stakeholders to meet needs that exist outside of the classroom (Simon, 1973; Jonassen, 2000)—this is in contrast to most...
This dissertation investigates processes controlling the Ca isotope geochemistry (δ44/40Ca) of Icelandic samples, from an atomic to island-wide scale. These studies embody the range of applications for which the Ca isotope proxy can apply in surficial environments, and I offer novel δ44/40Ca data for Icelandic rivers, rocks, minerals, soil, and...
Miniaturized lasers are important for fundamental studies of light-matter interactions and applications in on-chip photonic integration. Plasmonic nanoparticle lattices supporting surface lattice resonances can provide optical feedback for directional lasing emission at room temperature. This thesis focuses on how the design of plasmon cavities can enable engineering of laser emission...
Ionizing radiation is known for being dangerous at high doses, beneficial for diagnosis and treatment of diseases, and expensive for hazardous waste disposal and other protection policies governments put in place. Balancing the benefits and risks is key to maximizing public health, reducing public fears, and reducing extraneous costs that...
Semiconductor nanowires, such as group IV and III-V nanowires, shows distinct electrical, optical and mechanical properties from their bulk counterparts due to their nanoscale size and 1-D morphology. For example, the quantum confinement effect modulates the band gap of a semiconductor nanowire when its diameter approaches or below the exciton...
Theoretical investigation of photochemical processes in molecules is a nontrivial task. Ab initio calculations that completely describe such processes are often intractable to perform given today’s hardware. Thus, to gain insight into common areas of interest, such as in transition metal photochemistry and organic photovoltaics, less accurate but more feasible...
The demand for low cost, unconventional electronics requires new materials with unique characteristics that the traditionally used silicon-based technologies cannot provide. Metal oxide semiconductors, such has amorphous indium gallium zinc oxide (a-IGZO), have made impressive strides as alternatives to amorphous silicon for electronics applications. However, to achieve the full potential...
Before initiating a walking movement, the central nervous system forms a motor plan, a set of motor commands predicted to accomplish task-specific goals. To be effective, motor plans must be continually updated to consider an ever-changing external environment. Despite being an inherent part of walking, how the nervous system adapts...